The results of background measurements with the second version of the BOREXINO Counting Test Facility (CTF-II), installed in the Gran Sasso Underground Laboratory, were used to obtain limits on the instability of nucleons, bounded in nuclei, for decays into invisible channels (inv): disappearance, decays to neutrinos, etc. The approach consisted of a search for decays of unstable nuclides resulting from N and NN decays of parent 12C, 13C and 16O nuclei in the liquid scintillator and the water shield of the CTF. Due to the extremely low background and the large mass (4.2 t) of the CTF detector, the most stringent (or competitive) up-to-date experimental bounds have been established: τ(n→inv) > 1.8× 1025 yr, τ(p→inv) > 1.1×1026 yr, τ(nn→inv) > 4.9×1025 yr and τ(pp→inv) > 5.0×1025 yr, all at 90% C.L.

New limits on nucleon decays into invisible channels with the BOREXINO counting test facility / H.O. Back, M. Balata, A. de Bari, T. Beau, A. de Bellefon, G. Bellini, J. Benziger, S. Bonetti, C. Buck, B. Caccianiga, L. Cadonati, F. Calaprice, G. Cecchet, M. Chen, A. Di Credico, O. Dadoun, D. D’Angelo, V.Yu. Denisov, A. Derbin, M. Deutsch, F. Elisei, A. Etenko, F. von Feilitzsch, R. Fernholz, R. Ford, D. Franco, B. Freudiger, C. Galbiati, F. Gatti, S. Gazzana, M.G. Giammarchi, D. Giugni, M. Goeger-Neff, A. Goretti, C. Grieb, C. Hagner, G. Heusser, A. Ianni, A.M. Ianni, H. de Kerret, J. Kiko, T. Kirsten, V. Kobychev, G. Korga, G. Korschinek, Y. Kozlov, D. Kryn, M. Laubenstein, E. Litvinovich, C. Lendvai, P. Lombardi, I. Machulin, S. Malvezzi, J. Maneira, I. Manno, D. Manuzio, G. Manuzio, F. Masetti, A. Martemianov, U. Mazzucato, K. McCarty, E. Meroni, L. Miramonti, M.E. Monzani, P. Musico, L. Niedermeier, L. Oberauer, M. Obolensky, F. Ortica, M. Pallavicini, L. Papp, L. Perasso, A. Pocar, O.A. Ponkratenko, R.S. Raghavan, G. Ranucci, A. Razeto, A. Sabelnikov, C. Salvo, R. Scardaoni, D. Schimizzi, S. Schoenert, H. Simgen, T. Shutt, M. Skorokhvatov, O. Smirnov, A. Sonnenschein, A. Sotnikov, S. Sukhotin, V. Tarasenkov, R. Tartaglia, G. Testera, V.I. Tretyak, D. Vignaud, R.B. Vogelaar, V. Vyrodov, M. Wojcik, O. Zaimidoroga, Yu.G. Zdesenko, G. Zuzel. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 563:1-2(2003), pp. 23-34.

New limits on nucleon decays into invisible channels with the BOREXINO counting test facility

G. Bellini;S. Bonetti;B. Caccianiga;D. D’Angelo;D. Franco;E. Meroni;L. Miramonti;
2003

Abstract

The results of background measurements with the second version of the BOREXINO Counting Test Facility (CTF-II), installed in the Gran Sasso Underground Laboratory, were used to obtain limits on the instability of nucleons, bounded in nuclei, for decays into invisible channels (inv): disappearance, decays to neutrinos, etc. The approach consisted of a search for decays of unstable nuclides resulting from N and NN decays of parent 12C, 13C and 16O nuclei in the liquid scintillator and the water shield of the CTF. Due to the extremely low background and the large mass (4.2 t) of the CTF detector, the most stringent (or competitive) up-to-date experimental bounds have been established: τ(n→inv) > 1.8× 1025 yr, τ(p→inv) > 1.1×1026 yr, τ(nn→inv) > 4.9×1025 yr and τ(pp→inv) > 5.0×1025 yr, all at 90% C.L.
Baryon number conservation; Proton decay; Scintillation detector
Settore FIS/04 - Fisica Nucleare e Subnucleare
Settore FIS/01 - Fisica Sperimentale
2003
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/22852
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